一、概述对重要的公路、铁路实现全线覆盖是运营商提高网络品牌的一个重要环节,是提高综合竞争力的一个有力手段。而目前大多数隧道都是覆盖盲区,因此需要结合交通线的覆盖设计来制订专门的隧道覆盖解决方案。隧道覆盖主要分为铁路隧道、公路隧道、地铁隧道等多种。每种隧道有? I. Overview It is an important link for operators to improve their network brands to achieve full coverage of important highways and railways and is a powerful means of enhancing their comprehensive competitiveness. At present, most tunnels are covered with blind spots. Therefore, a special tunnel coverage solution needs to be formulated in conjunction with the coverage design of traffic lines. Tunnel coverage is divided into railway tunnels, road tunnels, subway tunnels and other. Each tunnel there?